We use a Cone CME scenario to develop the SIR-HUXt system with. This scenario reflects the climatological average CME. To build this scenario, we analysed the distribution of observed CME speeds and widths provided by KINCAT database in the HELCATS project. The KINCAT data are described in [1]} and [2]}, and consist of graduated cylindrical shell (GCS) fits [3]} of 122 CMEs observed in the STEREO COR2 coronagraphs [4]}. These GCS fits return estimates of the CME apex speed and the angular half-width. These data are presented as a scatter plot in Figure REF .
